67 Pa. Code § 187.2
The following words and terms, when used in this chapter, have the following meanings, unless the context clearly indicates otherwise:
Department-The Department of Transportation of the Commonwealth of Pennsylvania.
Freeway-A limited access highway to which the only means of ingress and egress is by interchange ramps.
Highway-The entire width between the boundary lines of every way publicly maintained when any part thereof is open to the use of the public for purposes of vehicular travel. The term includes a roadway open to the use of the public for vehicular travel on grounds of a college or university or public or private school or public or historical park.
Implement of husbandry-A vehicle designed or adapted and determined by the Department to be used exclusively for agricultural operations and only incidentally operated or moved upon highways.
Overwidth-The width of any vehicle including the permissible load or loads carried thereon excluding mirrors or sunshades, which exceeds either the general eight foot width limit or the special vehicle width limits specified in section 4921 of the act.
Permit-A special hauling permit issued by the Department pursuant to the provisions of Chapter 49, Subchapter D of the Vehicle Code, for the movement of an overlength, overwidth, overheight or overweight vehicle, or combination of vehicles, including the nondivisible load thereon, on State highways other than the Pennsylvania Turnpike.
Permit office-Any of the various engineering or maintenance district offices of the Department.
Special mobile equipment-Vehicles not designed or used primarily for the transportation of persons or property and only incidentally operated or moved over a highway, including but not limited to: ditch digging apparatus, well boring apparatus; earth moving and road construction and maintenance machinery, such as asphalt spreaders, bituminous mixers, bucket loaders, snowplows, ditchers, graders, finishing machines, road rollers, scarifiers, earthmoving carryalls, scrapers, power shovels and draglines; and self-propelled cranes and tractors, other than truck tractors. The term does not include house trailers, dump trucks; truck-mounted transit mixers, cranes or shovels; or other vehicles designed for the transportation of persons or property to which machinery has been attached.
Special vehicle-An implement of husbandry wider than eight feet but not exceeding 174 inches in width; a vehicle loaded with vegetable produce or forage crops wider than eight feet but not exceeding 120 inches in width; or special mobile equipment wider than eight feet but not exceeding 110 inches in width.
Sunrise-The time designated by the National Weather Bureau at which the sun can first be seen on the horizon.
Sunset-The time designated by the National Weather Bureau at which the sun can last be seen on the horizon.
Vehicle-Every device which is or may be moved or drawn upon a highway, except devices used exclusively upon rails or tracks.
67 Pa. Code § 187.2